为防止微生物对酚类化合物的氧化或分解,通常采取加()的方法一致微生物作用。
A.硫化亚铁和升温
B.硫化铁和降温
C.加酸(H3PO3)和降温
D.加碱(NaOH)和升温
参考答案:C
English is a language that many people around the world _______not speak perfectly but _________at least understand.
A.may,can
B.would,might
C.can,must
D.should,can
采芯